Description: 【Rotated Rearview Mirror】: Mountain bike rearview mirrors 360 degree rotation, adjustable to any angle, helps you see every direction of your back. 【High Quality Material】: Hidden Bicycle Rearview Mirror is made of durable material, Impact and scratch resistant, waterproof, and provides you with clear vision. 【Bike Rearview Mirror】High bike mirror, suitable for mounting on the rod end of the handlebar, rotatable design, with excellent vision and clear image. 【2 in 1 Bicycle Accessories】The rearview mirror can be used as a bike bar end after folding, and change postures to decrease fatigue, and make you feel more comfortable. 【Fit Most Bikes】: Applicable handlebar inner diameter 17-20mm, use 3mm inner hexagon installation(NOT Include), can be installed on both left & right, easy to install. Specification: Material: Plastic Size: 11cmx9.5cm/4.33inchx3.74inch Package Includes: 1 Bike Rearview Mirror(6 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.